It's hard to find a quality LED product but at the same time inexpensive these days. That's why if you're looking for quality COB LEDs I would recommend. They are well-built COBS with the quality CREE LEDs and a MEANWELL driver. They are also packed with all special features that other COB lights can't compare like dimmable light output.

ECO FARM 440/680/880W COB LED INDOOR PLANTS GROW LIGHT
Details:
Eco Farm grow lights using Bridgelux & Epistar 100W COB chips to make well-balanced light and illumination.
Professional 12 bands full spectrum LED grow light, best lighting mixture & evenly coverage full spectrum for indoor plants veg and flower UV&IR.
Two dimmers can adjust the concentration of different plants and different seedlings, vegetables and flowers.
Especially suitable for marijuana, cannabis medical plants.
Easily set the brightness of light according to your plant’s stage.

Specifications:
Led size: 440W/680W/880W
Remove free modular design for simple maintenance
Safety assurance, quality and durable.
2 dimmers separately control the intensity for Veg & Bloom
High-speed quiet cooling fans with aluminum heat dissipation sink

ECO FARM 525W/ 850W GROW LAMP FULL SPECTRUM GROW LIGHTS
Details:
Eco Farm led grow light full spectrum dimmable using single 5W LED and 4/6 100W COB chips to make well-balanced light and illumination.
Professional 13 bands full spectrum LED grow light is ideal for the perfect and well-sustained growth of your indoor plants plants.
3 separate dimmers in achieving the best quality light for seedling veg and flowering.
Especially suitable for indoor plants medical plants.
Easily set the brightness of light according to your plant’s stage.

Specifications:
Led size: 525W/ 850W
Convex optical lens makes the light brighter and evenly distribution
Safety assurance, quality and durable.
3 Years warranty

ECO FARM 120W COB FULL SPECTRUM LED GROW LIGHT WITH DOMESTIC CHIPS SEGMENTED LOOP TIMING LIGHT
Features:
ECO Farm high power 120W LED Grow Lights emit a higher amount of Lumen, PPFD and Par Value than other grow lights on the market. This delivers more power with deeper penetration than any other light is capable of. 

Specifications:
Model 120W led grow light
PPFD 30cm-1257μmol/(m·s)
Effective irradiation range(100CM high) 0.7㎡
Lamp beads 3030-1w-128pcs 660mm 3000k 4000k740n m 395nm
Single current 350mA
Power factor >0.95
Efficacy 2.7 μmol/J
Leds Angle 120 Degree
Product Size 350*170* 56mm
Input voltage AC 100-240V
Timer Segmented loop timing
CCT Monochromatic wavelength ratio full spectrum
Waterproof IP63
Lamp body material 6063 aluminum
Working temperature -25°C ~ 40°C
Lifetime 50000h
Warranty 15000h